BUY BZX84C6V8 https://www.utsource.net/itm/p/11272336.html
BZX84C6V8 Zener Diodes 6.8V 250mW/0.25W SOT23-6.8V marking Z5 low power
Zener Diode, 6.8V, 500mW, SOT-23 Features: - Low profile surface mount package - Low leakage current - High temperature soldering guaranteed: 260°C/10 seconds at terminals - Low zener impedance - High temperature stability - High reliability Applications: - Voltage regulation - Voltage reference - Voltage stabilization - Surge protection - Clamping - Polarity protection - ESD protection (For reference only)